Serialized queries function unreliably
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Key: LUCENENET-338
URL: https://issues.apache.org/jira/browse/LUCENENET-338
Project: Lucene.Net
Issue Type: Bug
Environment: Current trunk, standard .NET environment, Visual Studio
2008.
Reporter: Moray McConnachie
I've just tried slotting in current trunk in place of 2.3.1 we were using
previously. Everything appears to compile and work OK, but the results are not
correct when we introduce query serialization.
Executing a simple BooleanQuery: +titling:Russia
Results returned from query when not serialised: 3878 (correct)
Results returned when query serialised deserialized and run with same Searcher:
3879
Results returned when query serialised deserialized and run with new Searcher:
3 (!)
Last time we had an issue with serialized queries and filed a bug report
(https://issues.apache.org/jira/browse/LUCENENET-170), it was an issue with the
serialization of Parameter on which Occur depends, but Parameter looks still to
have the patch in as far as I can tell.
*Test code*
string
IndexPath=@"C:\SourceSafeWork\OxanOxweb\LuceneAndSearch\TEST\LuceneIndexWithFullTextSince2004";
//setup first query
BooleanQuery lucQuery = new BooleanQuery();
lucQuery.Add(new BooleanClause(new TermQuery(new
Lucene.Net.Index.Term("titling","russia")),BooleanClause.Occur.MUST));
//serialize and deserialize
BinaryFormatter bf = new BinaryFormatter();
System.IO.MemoryStream ms = new System.IO.MemoryStream();
bf.Serialize(ms, lucQuery);
ms.Seek(0, System.IO.SeekOrigin.Begin);
Query lucQuery2 = (Query)bf.Deserialize(ms);
ms.Close();
//get hit counts for 2 searches
IndexSearcher searcher = new IndexSearcher();
int hitCount = searcher.Search(lucQuery, 20).totalHits; //3878 hits
//bizarrely if I do not close the searcher and reopen the hit count is only 1
different i.e. 3879
searcher.Close();
searcher = new IndexSearcher(@IndexPath);
int hitCount2 = searcher.Search(lucQuery2, 20).totalHits; //3 hits
if (hitCount != hitCount2)
MessageBox.Show("Error in serialisation - different hit count");
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